Acidity of biomass fast pyrolysis bio-oils

Anja Oasmaa; Douglas C. Elliott; Jaana Korhonen

doi:10.1021/ef100935r

Acidity of biomass fast pyrolysis bio-oils

Anja Oasmaa^* (Corresponding Author), Douglas C. Elliott, Jaana Korhonen

^*Corresponding author for this work

Pacific Northwest National Laboratory (PNNL)

Research output: Contribution to journal › Article › Scientific › peer-review

237 Citations (Scopus)

Abstract

The use of the total acid number (TAN) method for measuring the acidity of biomass fast pyrolysis bio-oil was evaluated. Suggestions for carrying out the analysis have been made. The TAN method by American Society for Testing and Materials (ASTM) D664 or D3339 can be used for measuring the acidity of fast pyrolysis bio-oils and their hydrotreating products. The main difference between the methods is that ASTM D664 is specified for higher TAN values than ASTM D3339. Special focus should be placed on the interpretation of the TAN curves because they differ significantly from those of mineral oils. The curve for bio-oils is so gentle that the automatic detection may not observe the end point properly, and derivatization should be used. The acidity of fast pyrolysis bio-oils is mainly derived (60-70%) from volatile acids. Other groups of compounds in fast pyrolysis bio-oils that influence acidity include phenolics, fatty and resin acids, and hydroxy acids.

Original language	English
Pages (from-to)	6548-6554
Number of pages	7
Journal	Energy & Fuels
Volume	24
Issue number	12
DOIs	https://doi.org/10.1021/ef100935r
Publication status	Published - 16 Dec 2010
MoE publication type	A1 Journal article-refereed

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10.1021/ef100935r

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abstract = "The use of the total acid number (TAN) method for measuring the acidity of biomass fast pyrolysis bio-oil was evaluated. Suggestions for carrying out the analysis have been made. The TAN method by American Society for Testing and Materials (ASTM) D664 or D3339 can be used for measuring the acidity of fast pyrolysis bio-oils and their hydrotreating products. The main difference between the methods is that ASTM D664 is specified for higher TAN values than ASTM D3339. Special focus should be placed on the interpretation of the TAN curves because they differ significantly from those of mineral oils. The curve for bio-oils is so gentle that the automatic detection may not observe the end point properly, and derivatization should be used. The acidity of fast pyrolysis bio-oils is mainly derived (60-70%) from volatile acids. Other groups of compounds in fast pyrolysis bio-oils that influence acidity include phenolics, fatty and resin acids, and hydroxy acids.",

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T1 - Acidity of biomass fast pyrolysis bio-oils

AU - Oasmaa, Anja

AU - Elliott, Douglas C.

AU - Korhonen, Jaana

PY - 2010/12/16

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N2 - The use of the total acid number (TAN) method for measuring the acidity of biomass fast pyrolysis bio-oil was evaluated. Suggestions for carrying out the analysis have been made. The TAN method by American Society for Testing and Materials (ASTM) D664 or D3339 can be used for measuring the acidity of fast pyrolysis bio-oils and their hydrotreating products. The main difference between the methods is that ASTM D664 is specified for higher TAN values than ASTM D3339. Special focus should be placed on the interpretation of the TAN curves because they differ significantly from those of mineral oils. The curve for bio-oils is so gentle that the automatic detection may not observe the end point properly, and derivatization should be used. The acidity of fast pyrolysis bio-oils is mainly derived (60-70%) from volatile acids. Other groups of compounds in fast pyrolysis bio-oils that influence acidity include phenolics, fatty and resin acids, and hydroxy acids.

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Acidity of biomass fast pyrolysis bio-oils

Abstract

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